Frankfurter STP [Flat Back]

The Frankfurter in STP form!

If you plan to use with gravity funnel products, like the Winkie, please select the "larger urethra" size option -- this will prevent backflow. Hole is 3/8" and stretches to a max of 7/16". Be sure to look up the specs of any STPs other than the Winkie or Spouti that you plan to slide on in there!

The Spouti is able to handle a smaller urethra when placed properly. Functionally forming a vacuum, the smaller urethra causing an slight increase in urine velocity, aka a harder stream.

For beginners I recommend a larger urethra size just in case you end up preferring to switch between STP products.

Frank Specs:

Shaft =4.5 x 4.75” (d = 1.5")

Tab: 3.75 x 3.5” (non-standardized tab depth)

Scrote (w x h x d): 2.5 x 2.5 x 1.5”

Scrote Type: Flat Back

Full prosthetic length without tab =4 ”

Depth of bulge = 3”

[[Embedded Teste Size: ~2cm diameter]]

In Comparison to an average Cis Penis ((Shaft Specs, (L x g)): 3.6" x 3.7" (Standard Deviation ~0.6" // ~1.5cm)